Did you know that worker bees have more than 5,000 lenses in each eye and dragonflies have more than 30,000? Did you know a chameleon can move each of its eyes in opposite directions? This fascinating book will thrill children with facts, such as how crickets hear with their legs, how bats and dolphins use echolocation, how elephants hear low-frequency sounds, and how sharks use their lateral line for sensing movement in water. Other topics include animals that can sense ultraviolet and infrared light, temperature changes, and smells, and those that are able to detect magnetic fields. This book, illustrated with magnificent photographs, is more interesting than a science-fiction novel! Teacher's guide available.